Talks
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BLACKBOARD CHAT Dave Eggers joins former teachers Ninive Clements Calegari and Daniel Moulthrop to discuss the trio’s new book, “Teachers Have It Easy: The Big Sacrifices and Small Salaries of America’s Teachers” (New Press). Thursday, 7 p.m., Housing Works Used Book Cafe, 126 Crosby St., between Houston and Prince streets, 212-334-3324, free, used book donations encouraged.
SUMMING UP Professor, author, and composer Marty Lewinter gives a lecture titled “The History of Mathematics: Five Thousand Years of Cleverness,” tracking human thought and progress in math from early Mesopotamia and Egypt through ancient Greece and the Renaissance. The discussion is presented by the libertarian group Junto. Thursday, 8 p.m., General Society Library, 20 W. 44th St., between Fifth and Sixth avenues, 212-921-1767, free.
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